@Book{理解早期文明2014,
  author       = {Bruce G. Trigger},
  title        = {理解早期文明},
  publisher    = {北京大学出版社},
  year         = {2014},
}

@Book{Nancy2010,
  author       = {Nancy Howell},
  title        = {Life Histories of the Dobe !Kung},
  publisher    = {University of California Press},
  year         = {2010},
  month        = {5}
}

